Food processor accurate in matching

Abstract

The utility model discloses a food processor with accurate matching, which relates to the field of life electric appliances and comprises a main machine and a cup body assembly, the cup body assembly comprises a cup body and a cutter holder, the cutter holder comprises a heating disc and a heat insulation sleeve, and a stirring cutter assembly is arranged in the middle of the heating disc. The stirring cutter assembly comprises a surrounding plate extending downwards from the bottom wall of the heating disc, a bearing arranged in the surrounding plate and a cutter shaft penetrating through the bearing, the heat insulation sleeve is provided with a boss extending upwards, the boss is provided with a limiting structure which extends upwards and is in mutual sleeving interference fit with the surrounding plate, and the positioning accuracy of the heating disc and the heat insulation sleeve is improved; when the tool apron is installed on a main machine, the central axes of the main machine, the heat insulation sleeve and the heating disc are located on the same straight line, then an upper coupler connected with a tool shaft and a lower coupler connected with a motor are located on the same straight line, and the coaxiality after the upper coupler and the lower coupler are connected is guaranteed. Therefore, the transmission stability of the two is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a food processing machine with precise matching. Background Art

[0002] Existing food processors usually include a main unit and a cup assembly. The cup assembly is provided with a stirring member that is transmission-connected to the motor in the main unit. When a user uses the food processor to process food, the food is placed in the cup assembly, and then the stirring member is driven by the motor at high speed to process the food. In order to make it more convenient for the user to take the cup assembly, the cup assembly is usually detachably arranged on the main unit. When the user uses the food processor, the cup assembly is placed on the main unit, and the upper coupling in the cup assembly connected to the knife shaft and the lower coupling in the main unit connected to the motor can be matched in place to achieve torque transmission. The cup body assembly usually includes a cup body with upper and lower openings and a knife seat arranged at the lower end of the cup body, the knife seat includes a heating plate and an insulating sleeve arranged below the heating plate. After the cup body assembly and the main machine are assembled in place, the insulating sleeve is positioned and matched with the main machine, while the heating plate is used to install the knife shaft and the upper coupling. The existing insulating sleeve and the heating plate are only assembled by connecting structures such as screws, and the coaxiality and centration of the two cannot be guaranteed, which greatly reduces the coaxiality of the upper and lower couplings, and the transmission stability of the two is poor and will generate large friction noise. Especially when the rotation speed of the crushing device is high, the knife shaft of the crushing device may deviate, resulting in interruption of food processing, which seriously affects the consumer experience. Utility Model Content

[0003] The utility model aims to provide a precisely matched food processing machine, so as to solve the problem that the detachable cup body assembly in the existing food processing machine is not precisely positioned when installed on the main machine, resulting in low coaxiality of the upper and lower couplings, causing unstable transmission and noise.

[0004] To achieve the above-mentioned purpose, the utility model provides a food processing machine with precise matching, including a main machine and a detachable cup body assembly arranged on the main machine, the cup body assembly including a cup body with upper and lower openings and a knife seat arranged at the opening at the lower end of the cup body, the knife seat including a heating plate and a heat insulation sleeve arranged below the heating plate, a stirring knife assembly is provided in the middle of the heating plate, the stirring knife assembly includes a surrounding plate extending downward from the bottom wall of the heating plate, a bearing arranged in the surrounding plate and a knife shaft passing through the bearing, the heat insulation sleeve is provided with a boss extending upward, and the boss is provided with a limiting structure extending upward and being mutually sleeved with the surrounding plate for interference fit.

[0005] The present application provides a limiting structure on the boss that extends upward and is mutually sleeved with the enclosure for interference fit. When the heating plate and the insulation sleeve are assembled, the interference fit of the limiting structure and the enclosure can be used to improve the positioning accuracy of the heating plate and the insulation sleeve, thereby improving the centration of the heating plate and the insulation sleeve, so that when the knife seat is installed on the main machine, the central axes of the main machine, the insulation sleeve and the heating plate are located on the same straight line, thereby making the upper coupling connected to the knife shaft and the lower coupling connected to the motor located on the same straight line, ensuring the coaxiality of the upper and lower couplings after connection, thereby improving the stability of the transmission of the two, avoiding the situation where the coaxiality of the upper and lower couplings is low due to poor centrifugation between the insulation sleeve and the heating plate, resulting in poor stability of the transmission and easy generation of collision noise, while ensuring the stability of the rotation of the knife shaft while improving the transmission stability, and can effectively avoid the situation where the deviation of the knife shaft causes a large swing of the stirring member connected to the knife shaft, thereby causing insufficient or even interrupted processing of food, thereby improving the stability of food processing. In addition, the enclosure and the limiting structure are mutually sleeved and interference fit, so that when the insulation sleeve and the heating plate are assembled, they can be quickly installed and matched with the help of the positioning of the enclosure and the limiting structure, which helps to improve the assembly efficiency of the knife holder and reduce production costs.

[0006] In a preferred implementation of a precisely matched food processing machine, the limiting structure includes a limiting rib provided on the top surface of the boss and extending upward, and the inner side wall of the limiting rib is interference fit with the outer side wall of the enclosure.

[0007] By setting the limiting structure to include a limiting rib extending upward from the top surface of the boss, and the inner side wall of the limiting rib and the outer side wall of the enclosure are interference fit, the forming of the limiting structure is simpler, which helps to improve production efficiency, while reducing the modification of the original insulation sleeve, and can reduce the modification cost. Preferably, the limiting rib is a full circle of annular limiting ribs. On the one hand, it can further expand the matching area between the limiting rib and the enclosure, so that the two can be more closely matched, and the centering of the heating plate and the insulation sleeve can be further improved; on the other hand, after the full circle of limiting ribs and the enclosure are interference fit, the limiting rib and the enclosure are sealed, so that it can save the need to set a separate seal between the two to prevent food slurry from entering the insulation sleeve during food processing, simplifying the structure of the knife seat, reducing the size of the knife seat, reducing its occupied space, and further simplifying the assembly steps, which helps to further improve assembly efficiency.

[0008] In a preferred implementation of a precisely matched food processor, the mixing blade assembly further includes an upper shaft seal disposed above the bearing and a lower shaft seal disposed below the bearing, and the enclosure plate is clamped between the limiting rib and the lower shaft seal.

[0009] By setting the lower shaft seal and clamping the apron between the limiting rib and the lower shaft seal, the central axis of the lower shaft seal, the apron and the limiting rib are coaxially matched, and the knife shaft that cooperates with the lower shaft seal is also synchronously coaxially matched, thereby greatly improving the coaxiality of the entire knife seat, further ensuring the coaxiality after the upper and lower couplings are connected, thereby further improving the stability of the two during transmission. At the same time, the lower shaft seal and the apron achieve the first layer of sealing after abutment, and the limiting rib and the apron also have a second layer of sealing, which further improves the sealing effect of the insulation sleeve and the heating plate.

[0010] In a preferred implementation of a precisely matched food processor, the top wall of the boss is further provided with a positioning ring extending upward, and the bottom wall of the lower shaft seal abuts against the top wall of the positioning ring.

[0011] By providing an upwardly extending positioning ring on the top wall of the boss, and the bottom wall of the lower shaft seal abutting against the top wall of the positioning ring, on the one hand, after the positioning ring abuts against the lower shaft seal, a layer of seal is also formed on the contact surface between the positioning ring and the lower shaft seal, and a total of three layers of seal are achieved with the subsequent two layers of seal, further improving the sealing effect of the insulation sleeve and the heating plate; on the other hand, the top surface of the positioning ring increases the height of the top surface of the boss, so that even after the slurry passes through the through hole for the knife shaft to pass through, it needs to pass over the higher positioning ring to contact the lower shaft seal, thereby blocking the food slurry, which helps to further improve the blocking and sealing effect of the slurry.

[0012] In a preferred implementation of a precisely matched food processing machine, the top wall of the boss is also provided with an upwardly extending positioning ring, the positioning ring extends to the inner side of the enclosure, and the enclosure is clamped between the outer side wall of the positioning ring and the limiting rib.

[0013] By providing an upwardly extending positioning ring on the top wall of the boss, the positioning ring extends to the inner side of the enclosure, and the enclosure is clamped between the outer side wall of the positioning ring and the limiting rib, the outer side wall of the enclosure is limited by the abutment with the inner side wall of the limiting rib, and at the same time, the inner side wall of the enclosure is also limited by the abutment with the outer side wall of the positioning ring, thereby achieving a double interference fit, which can further enhance the positioning effect of the enclosure and help to further ensure the centration and coaxiality of the heat insulation sleeve and the heating plate.

[0014] In a preferred implementation of a precisely matched food processing machine, the inner wall of the limiting rib is provided with a plurality of vertically extending positioning ribs, and the positioning ribs are interference-fitted with the outer wall of the enclosure.

[0015] By providing a plurality of vertically extending positioning ribs on the inner wall of the limiting rib, and the positioning ribs having an interference fit with the outer wall of the enclosure, the interference fit between the positioning ribs and the enclosure can be used to apply inward torque to the enclosure in multiple circumferential directions, so that the enclosure can be more centered, further improving the limiting effect of the enclosure, and further improving the concentricity and coaxiality of the insulation sleeve and the heating element.

[0016] In a preferred implementation of a precisely matched food processing machine, the limiting structure includes a limiting groove provided on the top surface of the boss, and the enclosure plate is inserted into the limiting groove.

[0017] By setting the limiting structure to include a limiting groove set on the top surface of the boss, after the enclosure is inserted into the limiting groove, the inner wall and the outer wall of the limiting groove both squeeze and limit the enclosure, thereby achieving a double interference fit, which can further improve the positioning effect of the enclosure and help to further ensure the centering and coaxiality of the insulation sleeve and the heating plate.

[0018] In a preferred implementation of a precisely matched food processor, the main unit is detachably arranged below the knife seat, and a positioning ring and a lower coupler are provided at the top of the main unit, the knife seat is provided with a positioning groove matching with the positioning ring and an upper coupler matching with the lower coupler, and the center of the circle formed by the positioning ring and the lower coupler is located on the extension line of the central axis of the knife shaft.

[0019] By locating the center of the circle formed by the locating ring and the lower coupler on the extension line of the central axis of the knife shaft, the locating ring and the locating groove and the upper coupler and the lower coupler cooperate to achieve the center alignment of the main machine and the knife seat, thereby improving the coaxiality of the upper coupling and the lower coupling, ensuring the stability of the transmission when the upper coupling and the lower coupling transmit torque, especially when the crushing device rotates at high speed, avoiding the situation where the low coaxiality of the upper and lower couplings causes large vibration and noise during the transmission of the two, or even causes the crushing device to have a sway transmission failure, thereby ensuring the stability of the operation of the whole machine.

[0020] In a preferred implementation of a precisely matched food processor, the heating plate is connected to the insulation sleeve by a connecting structure. A plurality of connecting structures are provided and are spaced apart along the circumference of the insulation sleeve. The center of the circle enclosed by each connecting structure is located on the central axis of the knife shaft.

[0021] By setting the center of the circle formed by the connecting structures to be located on the central axis of the knife shaft, the heating plate and the insulation sleeve can not only be centered through the interference fit of the limiting structure and the enclosure, but also the centering and coaxiality of the two can be further improved with the help of the connecting structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 An exploded view of a food processing machine in one embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a knife holder in one embodiment of the utility model;

[0025] Figure 3 This is an exploded view of a knife holder in one embodiment of the utility model;

[0026] Figure 4 A cross-sectional view of a knife holder in one embodiment of the utility model;

[0027] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0028] Figure 6 A cross-sectional view of a knife holder in another embodiment of the utility model;

[0029] Figure 7 for Figure 6 Enlarged view of middle part B;

[0030] Figure 8 It is a schematic structural diagram of a heat insulation sleeve in one embodiment of the utility model.

[0031] List of parts and reference numerals:

[0032] 1-cup body; 2-main machine, 21-lower coupling, 22-positioning ring; 3-knife seat, 31-heating plate, 311-enclosure, 32-insulating sleeve, 321-boss, 3211-limiting rib, 32111-positioning rib, 3212-positioning ring, 33-knife shaft, 34-upper shaft seal, 35-bearing, 36-lower shaft seal, 37-upper coupling. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0034] It should be noted that many specific details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific implementation methods disclosed below.

[0035] like Figures 1 to 8As shown, the utility model provides a food processing machine with precise matching, including a main unit 2 and a cup body 1 assembly detachably arranged on the main unit 2, the cup body 1 assembly including a cup body 1 with upper and lower openings and a knife holder 3 arranged at the lower end opening of the cup body 1, the knife holder 3 including a heating plate 31 and a heat insulating sleeve 32 arranged below the heating plate 31, a stirring knife assembly is provided in the middle of the heating plate 31, the stirring knife assembly includes a surrounding plate 311 extending downward from the bottom wall of the heating plate 31, a bearing 35 arranged in the surrounding plate 311 and a knife shaft 33 passing through the bearing 35, the heat insulating sleeve 32 is provided with a boss 321 extending upward, and the boss 321 is provided with a limiting structure extending upward and being mutually sleeved with the surrounding plate 311 for interference fit.

[0036] The present application provides a limiting structure on the boss 321 that extends upward and is mutually sleeved with the enclosure 311 for interference fit, so that when the heating plate 31 and the insulation sleeve 32 are assembled, the interference fit between the limiting structure and the enclosure 311 can be used to improve the positioning accuracy of the heating plate 31 and the insulation sleeve 32, thereby improving the centering of the heating plate 31 and the insulation sleeve 32, so that when the knife seat 3 is installed on the host 2, the central axes of the host 2, the insulation sleeve 32 and the heating plate 31 are located on the same straight line, thereby making the upper coupling 37 connected to the knife shaft 33 and the lower coupling 37 connected to the motor The device 21 is located on the same straight line, ensuring the coaxiality of the upper and lower couplings 21 after connection, thereby improving the stability of the transmission between the two, avoiding the poor alignment of the heat insulation sleeve 32 and the heating plate 31, resulting in low coaxiality of the upper and lower couplings 21, which causes poor stability and easy collision noise during transmission between the two, while improving the transmission stability. The stability of the rotation of the knife shaft 33 is ensured, which can effectively avoid the deviation of the knife shaft 33 and cause the stirring member connected to the knife shaft 33 to swing greatly, thereby causing insufficient or even interrupted food processing, thereby improving the stability of food processing. In addition, the enclosure 311 and the limiting structure are mutually sleeved and interference fit, so that when the heat insulation sleeve 32 and the heating plate 31 are assembled, the positioning of the enclosure 311 and the limiting structure can achieve quick installation and matching, which helps to improve the assembly efficiency of the knife holder 3 and reduce production costs.

[0037] It should be noted that the present application does not specifically limit the limiting structure, which can be any one of the following embodiments:

[0038] Example 1: Figure 3 , Figure 4 As shown, in this embodiment, the limiting structure includes a limiting rib 3211 provided on the top surface of the boss 321 and extending upward, and the inner side wall of the limiting rib 3211 is interference fit with the outer side wall of the enclosure 311.

[0039] By setting the limiting structure to include a limiting rib 3211 extending upward from the top surface of the boss 321, and the inner wall of the limiting rib 3211 is interference fit with the outer wall of the enclosure 311, the forming of the limiting structure is simpler, which helps to improve production efficiency, while reducing the modification of the original insulation sleeve 32 and reducing the modification cost. Preferably, the limiting rib 3211 is a full circle of annular limiting rib 3211. On the one hand, the matching area between the limiting rib 3211 and the enclosure 311 can be further expanded, thereby making the two fit more closely, and can further improve the concentricity of the heating plate 31 and the insulation sleeve 32; on the other hand, after the full circle of limiting rib 3211 and the enclosure 311 are interference fit, a sealing fit is achieved between the limiting rib 3211 and the enclosure 311, thereby eliminating the need to separately set a seal between the two to prevent food slurry from entering the insulation sleeve 32 during food processing, thereby simplifying the structure of the knife seat 3, being able to reduce the size of the knife seat 3 and reduce its occupied space, while further simplifying the assembly steps, which helps to further improve the assembly efficiency.

[0040] As a preferred embodiment of this embodiment, Figure 4 As shown, the stirring blade assembly also includes an upper shaft seal 34 arranged above the bearing 35 and a lower shaft seal 36 arranged below the bearing 35 , and the enclosure 311 is clamped between the limiting rib 3211 and the lower shaft seal 36 .

[0041] By setting the lower shaft seal 36, and clamping the enclosure 311 between the limiting rib 3211 and the lower shaft seal 36, the central axes of the lower shaft seal 36, the enclosure 311 and the limiting rib 3211 are coaxially matched, and the knife shaft 33 that cooperates with the lower shaft seal 36 is also synchronously coaxially matched, thereby greatly improving the coaxiality of the entire knife seat 3, further ensuring the coaxiality after the upper and lower couplings 21 are connected, thereby further improving the stability of the two during transmission. At the same time, the lower shaft seal 36 and the enclosure 311 achieve a first layer of sealing after abutment, and the limiting rib 3211 and the enclosure 311 also have a second layer of sealing, which further improves the sealing effect of the insulation sleeve 32 and the heating plate 31. It should be noted that the abutment between the above-mentioned structures can be direct contact between surfaces, or it can be indirect contact achieved with the help of other structures such as shock-absorbing pads.

[0042] Furthermore, if Figure 4 As shown, the top wall of the boss 321 is further provided with a positioning ring 3212 extending upward, and the bottom wall of the lower shaft seal 36 abuts against the top wall of the positioning ring 3212 .

[0043] By providing an upwardly extending positioning ring 3212 on the top wall of the boss 321, and the bottom wall of the lower shaft seal 36 abuts against the top wall of the positioning ring 3212, on the one hand, after the positioning ring 3212 abuts against the lower shaft seal 36, a layer of seal is also formed on the contact surface between the positioning ring 3212 and the lower shaft seal 36, and a total of three layers of seal are achieved with the subsequent two layers of seal, further improving the sealing effect of the insulation sleeve 32 and the heating plate 31; on the other hand, the top surface of the positioning ring 3212 increases the height of the top surface of the boss 321, so that even if the slurry passes through the through hole for the knife shaft 33 to pass through, it needs to pass over the higher positioning ring 3212 to contact with the lower shaft seal 36, thereby blocking the food slurry, which helps to further improve the blocking and sealing effect of the slurry.

[0044] As a preferred implementation under this embodiment, Figure 4 As shown, the top wall of the boss 321 is further provided with a positioning ring 3212 extending upward, the positioning ring 3212 extends to the inner side of the enclosure 311 , and the enclosure 311 is clamped between the outer side wall of the positioning ring 3212 and the limiting rib 3211 .

[0045] By providing an upwardly extending positioning ring 3212 on the top wall of the boss 321, the positioning ring 3212 extends to the inner side of the enclosure 311, and the enclosure 311 is clamped between the outer side wall of the positioning ring 3212 and the limiting rib 3211, so that the outer side wall of the enclosure 311 is abutted and limited with the inner side wall of the limiting rib 3211, and at the same time, the inner side wall of the enclosure 311 is also abutted and limited with the outer side wall of the positioning ring 3212, thereby achieving a double interference fit, which can further enhance the positioning effect of the enclosure 311 and help to further ensure the concentricity and coaxiality of the heat insulation sleeve 32 and the heating plate 31.

[0046] As a preferred implementation under this embodiment, Figure 4 , Figure 8 As shown, the inner wall of the limiting rib 3211 is provided with a plurality of vertically extending positioning ribs 32111 , and the positioning rib 32111 is interference fit with the outer wall of the enclosure 311 .

[0047] By providing a plurality of vertically extending positioning ribs 32111 on the inner wall of the limiting rib 3211, and the positioning rib 32111 having an interference fit with the outer wall of the enclosure 311, the interference fit between the positioning rib 32111 and the enclosure 311 can be used to apply an inward torque to the enclosure 311 in multiple circumferential directions, so that the enclosure 311 can be more centered, further improving the limiting effect on the enclosure 311, and further improving the concentricity and coaxiality of the insulation sleeve 32 and the heating element.

[0048] Embodiment 2: In this embodiment, the limiting structure includes a limiting groove provided on the top surface of the boss 321, and the enclosure 311 is inserted into the limiting groove.

[0049] By setting the limiting structure to include a limiting groove set on the top surface of the boss 321, after the enclosure 311 is inserted into the limiting groove, the inner wall and the outer wall of the limiting groove both implement extrusion limiting on the enclosure 311, thereby achieving a double interference fit, which can further enhance the positioning effect of the enclosure 311 and help to further ensure the centering and coaxiality of the heat insulation sleeve 32 and the heating plate 31.

[0050] Example 3: Figure 6 , Figure 7 As shown, in this embodiment, the limiting structure includes an upwardly extending positioning ring 3212 provided on the top wall of the boss 321 , and the positioning ring 3212 extends to the inner side of the enclosure 311 and is interference fit with the enclosure 311 .

[0051] As a preferred implementation of the present application, Figure 1 As shown, the main machine 2 is detachably arranged below the knife seat 3, and a positioning ring 22 and a lower coupler are provided at the top of the main machine 2, the knife seat 3 is provided with a positioning groove cooperating with the positioning ring 22 and an upper coupler cooperating with the lower coupler, and the center of the circle formed by the positioning ring 22 and the lower coupler is located on the extension line of the central axis of the knife shaft 33.

[0052] By placing the center of the circle formed by the positioning ring 22 and the lower coupler on the extension line of the central axis of the knife shaft 33, the positioning ring 22 and the positioning groove and the upper coupler and the lower coupler cooperate to achieve the center alignment of the main machine 2 and the knife seat 3, thereby improving the coaxiality of the upper coupling 37 and the lower coupling 21, ensuring the stability of the transmission when the upper coupling 37 and the lower coupling 21 transmit torque, especially when the crushing device rotates at high speed, avoiding the low coaxiality of the upper and lower couplings 21 causing large vibration and noise during the transmission of the two, and even causing the crushing device to have a sway transmission failure, thereby ensuring the stability of the whole machine operation.

[0053] It can be understood that the circle formed by the positioning ring 22 and the lower coupler in the present application can be a circle formed by the line connecting the axes of the positioning ring 22 and the lower coupler, or a circle formed by the line connecting the positioning ring 22 and the outer wall or inner wall of the lower coupler, and no specific limitation is made here.

[0054] As a preferred implementation of the present application, Figure 3 , Figure 8 As shown, the heating plate 31 is connected to the heat insulating sleeve 32 via a connecting structure. A plurality of connecting structures are provided and are spaced apart along the circumference of the heat insulating sleeve 32 . The center of the circle enclosed by each connecting structure is located on the central axis of the blade shaft 33 .

[0055] By setting the center of the circle formed by the connecting structures to be located on the central axis of the knife shaft 33, the heating plate 31 and the insulation sleeve 32 can not only be centered through the interference fit of the limiting structure and the enclosure 311, but also the centering and coaxiality of the two can be further improved with the help of the connecting structure.

[0056] It should be noted that the present application does not make any specific limitation on the connection structure. As a preferred embodiment of the present application, as shown in the figure, the connection structure includes a stud extending upward from the bottom wall of the heat insulation sleeve 32, and a threaded hole vertically aligned with the stud is provided on the heating plate 31, and the screw is fastened in the threaded hole after passing through the stud. It can be understood that the circle enclosed by the connection structures in the present application can be a circle formed by the lines connecting the axes of the connection structures, or a circle formed by the lines connecting the outer walls or inner walls of the connection structures, and no specific limitation is made here.

[0057] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. A food processor with precise matching, comprising a main machine and a detachable cup assembly arranged on the main machine, wherein the cup assembly comprises a cup body with upper and lower openings and a knife seat arranged at the lower opening of the cup body, wherein the knife seat comprises a heating plate and a heat insulating sleeve arranged below the heating plate, characterized in that: A stirring blade assembly is provided in the middle of the heating plate, and the stirring blade assembly includes a surrounding plate extending downward from the bottom wall of the heating plate, a bearing provided in the surrounding plate, and a blade shaft passing through the bearing. The heat insulation sleeve is provided with an upwardly extending boss, and the boss is provided with a limiting structure extending upward and being mutually sleeved with the surrounding plate in an interference fit.

2. A food processing machine with precise matching according to claim 1, characterized in that: The limiting structure includes a limiting rib that is arranged on the top surface of the boss and extends upward, and the inner side wall of the limiting rib is interference fit with the outer side wall of the enclosure plate.

3. A food processing machine with precise matching according to claim 2, characterized in that: The stirring blade assembly also includes an upper shaft seal arranged above the bearing and a lower shaft seal arranged below the bearing, and the enclosure plate is clamped between the limiting rib and the lower shaft seal.

4. A food processing machine with precise matching according to claim 3, characterized in that: The top wall of the boss is also provided with a positioning ring extending upward, and the bottom wall of the lower shaft seal abuts against the top wall of the positioning ring.

5. The food processing machine with precise matching according to claim 2, characterized in that: The top wall of the boss is also provided with a positioning ring extending upward, the positioning ring extends to the inner side of the enclosure, and the enclosure is clamped between the outer side wall of the positioning ring and the limiting rib.

6. The food processing machine with precise matching according to claim 2, characterized in that: The inner side wall of the limiting rib is provided with a plurality of vertically extending positioning ribs, and the positioning ribs are interference fit with the outer side wall of the enclosure.

7. The food processing machine with precise matching according to claim 1, characterized in that: The limiting structure includes a limiting groove arranged on the top surface of the boss, and the enclosure plate is inserted into the limiting groove.

8. The food processing machine with precise matching according to claim 1, characterized in that: The limiting structure includes an upwardly extending positioning ring arranged on the top wall of the boss, wherein the positioning ring extends to the inner side of the enclosure and is interference fit with the enclosure.

9. The food processing machine with precise matching according to claim 1, characterized in that: The main unit is detachably arranged below the knife seat, and a positioning ring and a lower coupler are provided on the top of the main unit. The knife seat is provided with a positioning groove cooperating with the positioning ring and an upper coupler cooperating with the lower coupler. The center of the circle formed by the positioning ring and the lower coupler is located on the extension line of the central axis of the knife shaft.

10. The food processing machine with precise matching according to claim 1, characterized in that: The heating plate is connected to the heat-insulating sleeve via a connecting structure. A plurality of connecting structures are provided and are arranged at intervals along the circumference of the heat-insulating sleeve. The center of a circle enclosed by each of the connecting structures is located on the central axis of the knife shaft.

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